Tab for the printing plates of addressing machines



Oct. 22, 1929. J, KRELL 1,732,686

TAB FOR THE PRINTING-PLATES OF ADDRESSING MACHINES Filed Oct. 4, 1928 Patented Oct. 22, 1929 stares oFFIcE JOSEPH KRELL, OF BERLIN-ZEHLENDOBF, GERMANY Application filed October 4, 1928, Serial No. 310,3? 1, and in Germany October 19, 1927.

My invention relates to tabs for the print ing plates of addressing machines which are adapted to be inserted in slots in such plates, and it is an object of my invention to provide a reliable connection of the tab and the printing plate.

To this end, I make the tab with two parallel sides which may be obtained by doubling up a single piece of plate, and between the 19 parallel sides or flanges of the tab I insert a spring which when the tab is in position in a slot of the printing plate, engages behind the inner edge or edges of the slot.

Preferably my tab is equipped with a shank of reduced width as compared with the body of the tab which projects from the printing plate.

The spring within the tab projects at either end of the tab or its shank. Its ends will so recede when the tab is inserted in the slot of the printing plate, and return to their initial position when the tab has been inserted, en-

gaging behind the ends of the slots in the plate. In this manner the force which holds the tab in the slot acts in the longitudinal direction of the printing plate, that is, in parallel to its central plane, and the reaction of the spring ends exerts an effective clamping action, holding the tab in the plate with absolute reliability.

My novel tab may be extended over two or more slots in the printing plate, and in this case as well as in a tab extending over a single slot only, a single spring is provided which is held by two rivets, its ends projecting from either end of the tab or shank.

in the accompanying drawing, a tab having a single shank and a tab having two shanks, are illustrated by way of example.

In the drawing Fig. 1 is a plan view of a printing plate having two single-shank tabs and a doubleshank tab.

Fig. 2 is a longitudinal section of a singleshank tab, in section on the line IIII in Fig. 8,

Fig. 3 is a transverse section of the tab 011 the line III-J11 in Fig. 2,

Fig. 4 is a longitudinal section of a doubleshank tab.

Referring first to Fig. 1, 8, 8 are singleshank tabs bearing the indications F and 2, respectively, for registration, and 8 is a double shank tab, 7 being a printing .plate for an addressing machine,

Referring now to Figs. 2 and 3,8 is the body of the tab, and 5 isits reduced shank. 5 is a slot in the edge of the printing plate 7 the width of which is substantiallyequal to that of the shank 5, and the body 8 projects beyond either end of the shank 5.

The tab is made from a sheet metal plate which is doubled up in the shape of the letter ll so that the tab comprises two parallel side walls which are connected at the upper edge 9. 10 is a spring of substantially U-shape which may be bent from steel wire and is secured in the tab 8 by means of two rivets 11, 11 in proximity of the upper edge 9. 12 are hooks or projections formed on the ends of the spring 10 which normallygproject from the ends of the shank 5.

The shank 5 is rounded at its lower corners 1 1- to facilitate its insertion in the slot 6 and the base 15 of the shank is formed by 75 bending the lower end of one of the side walls of the tab over that of the other side wall will appear from Fig. 8. In this manner the two sides of the tab are firmly con nected at their lower ends and cannot come 80 apart which would interfere with the insertion ofthe tab.

the shank has been inserted in the slot 6 the hooks 12 will return to their initial position as shown in Fig. 2, and engage behind the edges of the slot 6 so that the tab is firmly held in the slot 6, the projecting edges of its body 8 being held in contact with the plate 7 by a component of force from the upper inclined portion of the hooks 1-2 which acts in thedirectionof the arrow 16, Fig. 2. 95 Referring now to Fig. l, this tab extends over two slots 6, 6 in the plate 7, having a body 8 and two shanks 5, 5" adapted to enter the slots. Otherwisethc construction of this tab is similar to the single-shank tab, Figs. 2 16 andB, having a spring 10 secured by rivets ends being adapted to engage behind the 11 in proximity to the upper edge 9 tab body 8, with hooks 12, 12 at its ends, and the bases 15 of its shanks being formed like the base 15 of the single shank 5 by bending over, as described.

The tab is secured in the same manner as the single-shank tab and held firmly in position by the springs 12, 12.

By making the tabs from two parallel walls of plate which are connected at their upper and lower edges, the tab becomes very stiff andstrong.

As mentioned, any number of shanks may be provided on a tab.

I claim:

1. A tab for printing plates of addressing machines adapted to be inserted in a slot in said plates, comprising two parallel sides, a spring inserted between said sides, and a projection on said spring adapted to engage behind an edge of said slot.

2. A tab for printing plates of addressing machines adapted to be inserted in a slot in said plates, comprising a body and a shank of reduced width on said body, said body and said shank comprising two parallel sides, a spring inserted between said sides and a pro 'jeotion on said spring which is adapted to engage'b ehind an edge of said slot.

3. A tab for printing plates of addressing machines adapted to be inserted in a slot in said plates, comprising two parallel sides, and a wire secured at two points within said tab and having hook-shaped ends projecting at either end of said tab.

4. A tab for printing plates of addressing machines adapted to be inserted in a slot in one of said plates, comprising a body doubled up from a single piece so as to constitute two parallel sides, a connection of the free'ends of said piece forming a ridge at the end of said tab, a spring inserted between said sides, and a pro ect1on on sald sprlng adapted to engage behind an edge of said slot.

5. A tab for printing plates of addressing machines having two parallel sides and comprising a'body, a shank of reduced width formedon said body for insertion in a slot of said plates, and means in said shank for engaging behind the edges of said slot.

6. A tab for printing plates of addressing machines having two parallel sides and comprising a body, shanks of reduced width formed on said body for insertion in a slotof said plates, and means in said shanks for engaging behind the edges of said slots.

7 7. A tab for printing plates of addressing machines having two parallel sides and comprising a body, shanks of reduced width formed on said body for insertion in a slot of said'plates, and a spring secured in said body and having its ends projecting from the ends of the shanks at either end of said tab, said of the edges of said slots.

In testimony whereof I afiix my signature.

JOSEPH KRELL. 

